Android app

Education.java

public class Education {

    public static final int UNIVERSITY_TYPE=0;
    public static final int INTERNET_TYPE = 1;
    public static final int SUBJECT_TYPE=2;


    public int type;
    public int image;
    public String words;

    public Education(String words, int image, int type) {
       this.words = words;
        this.image = image;
        this.type = type;

    }
    @SerializedName("duration")
    @Expose
    private String duration;
    @SerializedName("institution")
    @Expose
    private String institution;
    @SerializedName("degree")
    @Expose
    private String degree;



    public String getDuration() {
        return duration;
    }

    public void setDuration(String duration) {
        this.duration = duration;
    }

    public String getInstitution() {
        return institution;
    }

    public void setInstitution(String institution) {
        this.institution = institution;
    }

    public String getDegree() {
        return degree;
    }

    public void setDegree(String degree) {
        this.degree = degree;
    }

    public int type() {
     return type;
     }
}

education.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout android:layout_width="match_parent"
    android:layout_height="wrap_content"
    xmlns:android="http://schemas.android.com/apk/res/android">




    <android.support.v7.widget.RecyclerView
        android:layout_width="match_parent"
        android:scrollbars="vertical"
        android:id="@+id/recyclerView"
        android:layout_height="wrap_content"/>



</RelativeLayout>

education_item

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/colorBlust"
    android:orientation="vertical">


    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:baselineAligned="false"
        android:orientation="horizontal">

        <ImageView
            android:id="@+id/educationImage"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:layout_marginStart="5dp"
            android:layout_marginLeft="5dp"
            android:src="@drawable/education_information"
            tools:ignore="ContentDescription" />

        <TextView
            android:id="@+id/education_info"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:layout_marginStart="10dp"
            android:layout_marginLeft="10dp"
            android:text="@string/education_information"
            android:textColor="@color/colorWhite"
            android:textSize="20sp" />

    </LinearLayout>

    <TextView
        android:id="@+id/duration"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginStart="12dp"
        android:layout_marginLeft="12dp"
        android:text="@string/text_duration"
        android:textColor="@color/colorWhite"
        android:textSize="16sp" />

    <TextView
        android:id="@+id/institution"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginStart="12dp"
        android:layout_marginLeft="12dp"
        android:text="@string/text_institution"
        android:textColor="@color/colorWhite"
        android:textSize="16sp" />

    <TextView
        android:id="@+id/degree"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="center"
        android:layout_marginStart="12dp"
        android:layout_marginLeft="12dp"
        android:text="@string/text_degree"
        android:textColor="@color/colorWhite"
        android:textSize="16sp" />






</LinearLayout>

EducationAdapter.java

public class EducationAdapter extends RecyclerView.Adapter {


    public Context context;
    public List<Education> educationList;


    private EducationItem educationItem;

    public static class EducationViewHolder extends RecyclerView.ViewHolder {
        public TextView duration, institution, degree;


        public EducationViewHolder(View view) {
            super(view);

            duration = (TextView) itemView.findViewById(R.id.duration);
            institution = (TextView) itemView.findViewById(R.id.institution);
            degree = (TextView) itemView.findViewById(R.id.degree);


        }
    }

    public static class SubjectViewHolder extends RecyclerView.ViewHolder {
        public ImageView subjectImage;
        public TextView subjects;

        public SubjectViewHolder(@NonNull View itemView) {
            super(itemView);


            subjectImage = (ImageView) itemView.findViewById(R.id.subjectImage);
            subjects = (TextView) itemView.findViewById(R.id.subjects);


        }
    }

    public static class UniversityViewHolder extends RecyclerView.ViewHolder {
        public ImageView icon;
        public TextView item;

        public UniversityViewHolder(@NonNull View itemView) {
            super(itemView);


            icon = (ImageView) itemView.findViewById(R.id.icon);
            item = (TextView) itemView.findViewById(R.id.item);


        }
    }


    public EducationAdapter(List<Education> educationList, EducationItem educationItem, Context context) {

        this.educationList = educationList;
        this.context = context;

        this.educationItem = educationItem;

    }


    @NonNull
    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View itemView;
        switch (viewType) {

            case INTERNET_TYPE:
                itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.education_item, parent, false);


                return new EducationViewHolder(itemView);

            case SUBJECT_TYPE:
                itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.subject, parent, false);


                return new SubjectViewHolder(itemView);
            case UNIVERSITY_TYPE:
                itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.subject_list, parent, false);
                return new UniversityViewHolder(itemView);


        }
        return null;
    }

    @Override
    public int getItemViewType(int position) {

        switch (educationList.get(position).type) {
            case 0:
                return Education.INTERNET_TYPE;
            case 1:
                return Education.SUBJECT_TYPE;
            case 2:
                return Education.UNIVERSITY_TYPE;
            default:
                return -1;
        }
    }

    @Override
    public int getItemCount() {
        return educationList.size();
    }


    @TargetApi(Build.VERSION_CODES.M)
    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
    @Override
    public void onBindViewHolder(@NonNull final RecyclerView.ViewHolder holder, final int position) {

        Education education = educationList.get(position);
        if (education != null) {
            switch (education.type()) {
                case Education.INTERNET_TYPE:
                    ((EducationViewHolder) holder).duration.setText(education.getInstitution());
                    ((EducationViewHolder) holder).degree.setText(education.getDegree());
                    ((EducationViewHolder) holder).institution.setText(education.getInstitution());
                    break;


                case Education.SUBJECT_TYPE:
                    ((SubjectViewHolder) holder).subjects.getContext().getResources(R.string.university_subjects);
                    ((SubjectViewHolder) holder).subjectImage.getContext().getDrawable(R.drawable.university_subjects);
                    break;


                case Education.UNIVERSITY_TYPE:
                    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                        ((UniversityViewHolder) holder).icon.setImageResource(education.image);
                    }
                    ((UniversityViewHolder) holder).item.setText(education.words);


                    break;

            }
        }


    }
}

EducationItem.java

public class EducationItem extends AppCompatActivity {

    private EducationAdapter educationAdapter;
    public List<Education> educationList;
    Context context;




    protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
    setContentView(R.layout.education);
        educationList.add(new Education("Computer Science", R.drawable.computer_science, Education.UNIVERSITY_TYPE));
        educationList.add(new Education("Data Structure", R.drawable.data_structure, Education.UNIVERSITY_TYPE));

     

    KitabInterface kitabInterface = ApiClient.getApiService();
    Call<KitabSawti> call = kitabInterface.getEducation();

        call.enqueue(new Callback<KitabSawti>() {
        @Override
        public void onResponse(Call<KitabSawti> call, Response<KitabSawti> response) {
            educationList=  response.body().getEducation();
            for(Education e: educationList){
                Log.e("items", e.toString());
            }



            RecyclerView recyclerView  =  findViewById(R.id.recyclerView);
            recyclerView.setLayoutManager(new LinearLayoutManager(getApplicationContext()));
            educationAdapter = new EducationAdapter(educationList, EducationItem.this, context ); // changes
            recyclerView.setAdapter(educationAdapter);
        }

        @Override
        public void onFailure(Call<KitabSawti> call, Throwable t) {

        }
    });
}
}

subject.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:tools="http://schemas.android.com/tools"
    android:background="@color/colorBlust"
    android:orientation="horizontal">

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="horizontal">

            <ImageView
                android:id="@+id/subjectImage"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:layout_marginStart="20dp"
                android:layout_marginLeft="20dp"
                android:src="@drawable/university_subjects"
                tools:ignore="ContentDescription" />

            <TextView
                android:id="@+id/subjects"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:layout_marginStart="100dp"
                android:layout_marginLeft="100dp"
                android:text="@string/university_subjects"
                android:textColor="@color/colorWhite"
                android:textSize="20sp" />
        </RelativeLayout>
</LinearLayout>

subject_list.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/colorBlust"
    android:orientation="horizontal" >

    <ImageView
        android:id="@+id/icon"
        android:layout_width="60dp"
        android:layout_marginLeft="10dp"
        android:layout_height="60dp"
        android:src="@drawable/computer_science"
        android:padding="5dp"
        android:layout_marginStart="10dp" />

    <LinearLayout android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <TextView
            android:id="@+id/item"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/computers_science"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:layout_marginLeft="10dp"
            android:layout_marginTop="5dp"
            android:padding="2dp"
            android:textColor="@color/colorWhite" />

    </LinearLayout>



</LinearLayout>